But then John kisses right below his ear and it's the most natural thing in the world to loosen his grip, to slide a palm to the back of John's head, to kiss him slow and warm and find when John turns the kiss dirty, he can keep right up. It's natural to let his thighs fall further apart, to welcome the snug fit of John's hips against his own, to rock up into the warm weight of John's body and accept the answering push back, to twine his fingers in short, dark hair and welcome the slide of John's slick tongue.